Razor blade sharpener



pril 27, 1948. E; OLSON 2,440,520

- RAZOR BLADE SHARPENER Filed Dec. 6, 1946 F/G. 4. F/G. 5

Patented Apr. 27, 1948 NT OFFICE RAZOR BLADE SHARIENER Eric Olson; Beloit, Wis. u t Application December 6, 1946, Serial No.V 714,524

This invention relates to blade sharpening devices, and more particularly to a device for sharpening safety razor blades of the doubleedge type.

A main object of the invention is to provide a novel and improved razor blade sharpening device which is very simple in construction, easy to use, and efficient in operation.

A furtherobject of the invention is to provide an improved razor bladev Sharpener which is inexpensive to manufacture, neat in appearance, and compact in size. Y

Further objects and advantages of the invention 'will become apparent from the following description and claims, and from the accompanying drawings, wherein: I

Figure 1 is a vertical longitudinal cross-sectional view taken through a razor blade sharpening device according to the present invention.

Figure 2 is a plan View, with its top cover removed, of the blade sharpening device of Figure l.

Figure 3 is a side elevational view of the sharpening device of Figure 1.

Figure 4 is a vertical transverse cross-sectional view taken on line llI--II of Figure 1.

Figure 5 is a perspective detail view of `a hone plate member employed in the blade sharpening device of Figure 1.

Figure 6 is an enlarged detail view, partly in cross-section, of the blade engaging portion of the blade oscillating arm employed in the sharpening device of Figure 1;

Referring to the drawings, I I designates a generally rectangular base member provided with a depending transverse leg I2 adjacent each end thereof to support base member I I in raised relation to a subadjacent supporting surface.

The top surface of base member II is recessed at I3, and journaled transversely in the side walls of the recessed portion I3 is a crank shaft I4, the

5 claims. (111.51458) 1 formed with aflange'portion 2li4 and a stud por-v cavity I3 being further recessed at I5 to provide rotative clearance for the crank portion of crankshaft I4. Keyed to one end of crankshaft I4 is an operating crank IS, said crank being pivoted to the crankshaft at the keyed connection thereof so that the crank may be folded flush against the adjacent side edge of base II when the blade sharpening device is not in use.

Rotatively engaged with the crank portion of crankshaft I4 is the recessed rear end of a forwardly extending arm Il, the forward end of said arm .being formed with a downwardly directed leg I 8. rl'he end of leg I8 is transversely grooved, and secured in the groove is a resilient foot member I9 of rubber or the like. Foot member I9 is tion 2I. Stud portion 2| is `shaped so as to lit into the intermediate portion of the center recess of a standard double-edged razor blade with the flange-portionrZ overlying the surface of the bladeadjaccnt said center recess, thus being interlocked-with the blade; for `imparting longitudinal movement` thereto` responsive to rotation of crankshaftM. ,-1, .l l .t

Y Pivota-llysecured tothe intermediate portion of ,armr Il is a depending vrod member 22- which extends downwardly through a flared opening 23 formed in base member II. Threaded onthe lower end of rod ,member 22 is a knurled nut 2,4, and encircling the rod member between nut 24 and the'bottom surface of :base memberl I I is a coiled spring 25 which providesv downward tension on the rod member, said `tension being, adjusted by nut 24 to a desired*,"v'alue.` Asuitablebea'ring washer is positionedbetweenthetop of sprin'g25 and the adjacent bottom surface of base member The base member II is formed at its forward position with a rectangular recess 26, and secured in the forward portion of the recess is an. upstanding projection 21 which defines with the walls of recess 26 a square seat. Removably positioned in the square seat thus defined is a square hone plate member 28 which is symmetrically concaved on both sides as shown at 29,

29, whereby the plate may be employed on either its top or bottom side. Hone plate member 28 may be positioned with its concaved portions 29, 29 extending either longitudinally or transversely with respect to base member I I.

Removably secured to the rear end portion of basemember II, as by a dovetailed connection, is a cover member 30 formed with an internal cavity r3l which overlies the crankshaft I=4 and the rearward portion of arm I1. Cover member 30 is preferably smoothly curved in outer contour so as to provide a streamlined appearance.

In operation, a blade is placed on the hone plate member 28 and its central recess is interlocked with the resilient foot member I9. Arm H may be lifted suiliciently to position the blade on the hone plate member as thus described.

Crank I6 is then rotated, which causes the blade to oscillate forwardly and rearwardly on the hone plate member, the edges of the blade being in contact with the concave surface of the hone. The pressure on the blade may be regulated by adjusting knurled nut `2li. After the .blade is sharpened, it may readily be removed by lifting arm I1, as shown in dotted view in Figure 1.

and disengaging the blade' from the resilient foot member I9.

In the position of the hone plate 28 shown in beyond further usefulness, the plate may he.

turned over and used on the other side, thus extending the life of the hone. j

While a specific embodiment of a razorrblade sharpening device has beendisclosed ins-the foregoing description, it will be :understood 'that various modifications within the spirit of the invention may occur to those skilled inthe art.

Therefore, it is intended that no limitations be placed kon the invention--otherwthan as defined by the A'scope .of 'the appendedclaimsl What-.isvclaimed'is-z i 1. A razor lblade sharpening devicecompris-l ing al base member, a-crankshaft' A:journaledlin said base member, anarm connectedv to said crankshaft' forreciprocating-movement respon'- sive to'- rotation ofsaidcrankshaftga resilient foot member carried by said arm adapted-'teinterlcck,witl-i-v-,a'razor blade, la hone plate carried ,on said baseA member-beneath/ said foot member, and 'slc'rzrin'g Ameans biasing said armdownwardly whereby said foot member exerts pressure on said lione plate.

12, A razor 'blade sharpening device. comprising a base member, a crankshaft' ,'ournaled in said basemember, an arm connectedto saidI crankshaft for reciprocating movement responsive to rotation Q'sad' oranilzshafig` Vmeans carried by saidarm adaptedto iinoerlock--Withk a -razor blade,

4 a hone element on said base member subadjacent to said means, and spring means biasing s'aid arm downwardly.

3. A razor blade sharpening device comprising a base, a crankshaft journaled in said base, an arm connected to said crankshaft for reciprocating movement responsive to rotation of said crankshaft, means carried by said arm adapted. to interlock with a razor blade, `a square hone plate, said'base ,plate being formed subadjacent said means with a recess shaped to snugly receive ,the hone plate, and spring means biasing said arm downwardly.

razorblade sharpening device comprising a base, a crankshaft journaled in said base, an

'arm' connected to said crankshaft for reciprocating movementr-esponsive to rotation of said crankshaft, means carried by said arm adapted to interlock with a razor blade, a square hone plate, said plate being .concaved on both sides, said basegplate.- beingl formed subadiaeent Said meanswith a recessshapedto snugly receive the hone plate, ay 'tension element' Vpivotallyy secured to and depending from said arm, and moans ex,- erting downward spring pressure: on Said'V-tension element.

`5. Arazorxblade sharpeningxdevee comprising a base, a crankshaftl journaledsin said base, .an armi. connected 'to said Lcrankshaft for `recite.@wat ing :movement .responsive to* rotation of;` Ysaid crankshaft, a .dependingleg-carried by saidfarm; a rubber foot element carriedbyfsaid leg.-s aid element being shaped tointerlock` with xa,` razor blade, a honeelement ,ony said base subadjacent said element, a tension member pivotallyisecnred to and depending from the intermediate kportion of saidar-m, and lmeans exerting `downward spring pressure on the lower :end ofv said tension member.

Y ERIC OLSON` 

